title: Toxicity assessment of cerium oxide nanoparticles in cilantro (Coriandrum sativum L.) plants grown in organic soil.
abstract: Studies have shown that CeO₂ nanoparticles (NPs) can be accumulated in plants without modification, which could pose a threat for human health. In this research, cilantro (Coriandrum sativum L.) plants were germinated and grown for 30 days in soil amended with 0 to 500 mg kg⁻¹ CeO₂ NPs and analyzed by spectroscopic techniques and biochemical assays. At 125 mg kg⁻¹, plants produced longer roots (p ≤ 0.05), and at 500 mg kg⁻¹, there was higher Ce accumulation in tissues (p ≤ 0.05). At 125 mg, catalase activity significantly increased in shoots and ascorbate peroxidase in roots (p ≤ 0.05). The FTIR analyses revealed that at 125 mg kg⁻¹ the CeO₂ NPs changed the chemical environment of carbohydrates in cilantro shoots, for which changes in the area of the stretching frequencies were observed. This suggests that the CeO₂ NPs could change the nutritional properties of cilantro.
authors.affiliation: Department of Chemistry, The University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas 79968, USA.
authors.forename: Maria Isabel
authors.initials: MI
authors.lastname: Morales
authors.forename: Cyren M
authors.initials: CM
authors.lastname: Rico
authors.forename: Jose Angel
authors.initials: JA
authors.lastname: Hernandez-Viezcas
authors.forename: Jose E
authors.initials: JE
authors.lastname: Nunez
authors.forename: Ana Cecilia
authors.initials: AC
authors.lastname: Barrios
authors.forename: Alejandro
authors.initials: A
authors.lastname: Tafoya
authors.forename: Juan Pedro
authors.initials: JP
authors.lastname: Flores-Marges
authors.forename: Jose R
authors.initials: JR
authors.lastname: Peralta-Videa
authors.forename: Jorge L
authors.initials: JL
authors.lastname: Gardea-Torresdey
mesh_terms: D002563:Cerium / Q000032:analysis* / Q000378:metabolism / Q000633:toxicity; D028526:Coriandrum / Q000009:adverse effects / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D005506:Food Contamination; D006801:Humans; D053768:Metal Nanoparticles / Q000032:analysis* / Q000633:toxicity; D058871:Organic Agriculture; D018517:Plant Roots / Q000009:adverse effects / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000009:adverse effects / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D018570:Risk Assessment; D012989:Soil Pollutants / Q000032:analysis* / Q000378:metabolism / Q000633:toxicity
chemical_list: D012989:Soil Pollutants; D002563:Cerium; C030583:ceric oxide